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Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Coupled excitation"

1

Xu, Lizhong, and Fen Wang. "Nonlinear Forced Response of Electromechanical Integrated Toroidal Drive to Coupled Excitation." Scientific World Journal 2012 (2012): 1–10. http://dx.doi.org/10.1100/2012/743138.

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The electric excitation and the parameter excitation from mesh stiffness fluctuation are analyzed. The forced response equations of the drive system to the coupled excitations are presented. For the exciting frequencies far from and near natural frequencies, the forced responses of the drive system to the coupled excitations are investigated. Results show that the nonlinear forced responses of the drive system to the coupled excitations change periodically and unsteadily; the time period of the nonlinear forced responses depends on the frequencies of the electric excitation, the mesh parameter excitation, and the nonlinear natural frequencies of the drive system; in order to improve the dynamics performance of the drive system, the frequencies of the electric excitations should not be taken as integral multiple of the mesh parameter exciting frequency.
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2

LiZhong, Xu, and Fu XiaoRui. "Electromechanical Coupled Forced Responses for Microplate." Advances in Mechanical Engineering 6 (January 1, 2014): 857015. http://dx.doi.org/10.1155/2014/857015.

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The electromechanical coupled forced response of the microplate subjected to electrostatic force is investigated. Using electromechanical coupled dynamic equations and the mode superposition method, the forced responses of the microplate to voltage excitation and load excitation are analyzed, respectively. Based on this, the coupled forced responses of the micrplate to voltage and load excitations are obtained. Beat vibration caused by the coupled response is investigated and the condition that the beat vibration occurs is determined.
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3

Qian, Y. H., and D. M. Yan. "Fast–Slow Dynamics Analysis of a Coupled Duffing System with Periodic Excitation." International Journal of Bifurcation and Chaos 28, no. 12 (November 2018): 1850148. http://dx.doi.org/10.1142/s0218127418501481.

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In this paper, a two-degree-of-freedom nonlinear coupled Duffing equation with an external excitation and two external excitations are studied. For the coupled Duffing system with periodic excitation, the system shows the dynamic behavior on different time scales when the excitation frequency and the inherent frequency of the system are different. Firstly, we discretize the system by using the Euler method, and the discrete equation is obtained. Secondly, the two external excitations are considered as slow variables that are transformed into a slow variable by the Moivre formula, which divides the original system into the fast–slow subsystem. Finally, the oscillation dynamic behavior of the coupled system is discussed by combining fast–slow analysis method and the transformation phase diagram.
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4

Ren, Fushen, Baojin Wang, and Suli Chen. "Nonlinear Modeling and Qualitative Analysis of Coupled Vibrations in a Drill String." International Journal of Bifurcation and Chaos 28, no. 10 (September 2018): 1850119. http://dx.doi.org/10.1142/s0218127418501195.

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A coupled model for axial/torsional/lateral vibrations of the drill string is presented, in which the nonlinear dynamics and qualitative analysis method are employed to find out the key factors and sensitive zone for coupled vibration. The drill string is simplified as an equivalent shell under axial rotation. After dimensionless processing, the mathematical model for coupled axial/torsional/lateral vibrations of the drill string is obtained. The Runge–Kutta–Fehlberg method is employed for the numerical simulation, and the rules that govern the changing of the torsional and axial excitation are revealed. And the stability domains of the explicit Runge–Kutta method are analyzed. Furthermore, the suggestions for field applications are also presented. It is demonstrated by simulation results that the lateral/axial/torsional vibrations exist simultaneously and couple with each other. The system will obtain a stable period motion with an axial excitation zone before the coupled vibration in the three directions, and continue to increase the axial excitation to cause the coupled vibration easily. The torsional excitation of the drill string mainly contributes to the coupled vibration in the three directions when in a specific rotation speed zone. The system is more likely to obtain a periodic motion through adjusting the torsional excitation out of this zone.
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5

LEI, YOUMING, and FULI GUAN. "DISORDER INDUCED ORDER IN AN ARRAY OF CHAOTIC DUFFING OSCILLATORS." International Journal of Modern Physics C 23, no. 10 (October 2012): 1250071. http://dx.doi.org/10.1142/s0129183112500714.

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This paper addresses the issue of disorder induced order in an array of coupled chaotic Duffing oscillators which are excited by harmonic parametric excitations. In order to investigate the effect of phase disorder on dynamics of the array, we take into account that individual uncoupled Duffing oscillator with a parametric excitation is chaotic no matter what the initial phase of the excitation is. It is shown that phase disorder by randomly choosing the initial phases of excitations can suppress spatio-temporal chaos in the system coupled by chaotic Duffing oscillators. When all the phases are the same and deterministic, the oscillators remain chaotic and asynchronous no matter what the common phase is. When driven asynchronously by introducing phase disorder, the oscillators coupled in the array appear more regular with increase of the amplitude of random phase, and the highest level of synchrony between them is induced by intermediate phase disorder, displaying a resonance like phenomenon caused from the transition of the coupled oscillators from chaos to periodic motion. Since varying the initial phases of excitations is more feasible than altering parameters intrinsic to the oscillators coupled in an array, this study provides a practical method for control and synchronization of chaotic dynamics in high-dimensional, spatially extended systems, which might have potential applications in engineering, neuroscience and biology.
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6

WENG, GUO-EN, BAO-PING ZHANG, MING-MING LIANG, XUE-QIN LV, JIANG-YONG ZHANG, LEI-YING YING, ZHI REN QIU, et al. "OPTICAL PROPERTIES AND CARRIER DYNAMICS IN ASYMMETRIC COUPLED InGaN MULTIPLE QUANTUM WELLS." Functional Materials Letters 06, no. 02 (April 2013): 1350021. http://dx.doi.org/10.1142/s1793604713500215.

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Optical properties and carrier dynamics of InGaN/GaN asymmetric coupled quantum wells (ACQWs) are studied by excitation-power-dependent photoluminescence (PL), photoreflectance (PR) and time-resolved PL (TRPL) experiments. Under weak excitations, only the emission from the widest well is observed due to the tunneling from narrower to wider wells. Under strong excitations, the carrier distribution becomes more uniform and an enhanced emission from the mid well (2.5 nm well) is observed. Dependence of the PL intensity on excitation power is well explained by a rate equation model. The energy levels in the ACQW structure are clearly revealed by PR measurements and are in good agreement with calculations. Our results indicate that the enhanced emission from the mid well is ascribed to "reverse tunneling" from 3.0 to 2.5 nm well, which is confirmed by TRPL experiments.
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7

Li, Shouying, Yuanyuan Wang, Qingyu Zeng, and Zhengqing Chen. "Coupled responses of stay cables under the combined rain–wind and support excitations by theoretical analyses." Advances in Structural Engineering 23, no. 11 (March 10, 2020): 2261–75. http://dx.doi.org/10.1177/1369433220911164.

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Stay cables on several cable-stayed bridges all over the world have been found to experience rain-wind-induced vibrations under the combined action of rain and wind. Meanwhile, the bridge deck might also have obvious oscillation under the wind and/or traffic loads. The coupled responses of a stay cable under the combined rain–wind and support excitations are numerically investigated in this article. The equations of motion of a three-dimensional continuous stay cable are derived by considering the high-order nonlinear components of the dynamic cable tension, together with the equation of motion of the rivulet on the cable surface. The forces induced by rain–wind excitation are determined by the quasi-steady theory, and the support excitation is achieved by the boundary condition. The coupled equations of the cable and the rivulet are numerically solved by using the finite difference method and the fourth-order Runge–Kutta method, respectively. The numerical results show that the high-order nonlinear components of the dynamic cable tension should be taken into account to numerically reproduce the parametric vibration of the stay cable, whereas they hardly have any effects on the rain-wind-induced vibration and the resonance vibration of the stay cable. The responses of stay cable under vertical support oscillation only and the rain–wind excitation only obtained from this study agree well with the literature results. Compared with the results induced by single-source excitation, the cable response amplitude under the combined excitations is smaller than that induced only by support excitation and larger than that induced only by rain–wind excitation. The rivulet is prone to be thrown from the cable surface if the parametric vibration of the stay cable is evoked.
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8

Kitamura, H., M. S. Murillo, and J. C. Weisheit. "Atomic excitation in strongly coupled plasmas." Le Journal de Physique IV 10, PR5 (March 2000): Pr5–493—Pr5–496. http://dx.doi.org/10.1051/jp4:2000595.

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9

Walls, Jamie D., Malgorzata Marjanska, Dimitris Sakellariou, Franca Castiglione, and Alexander Pines. "Selective excitation in dipole coupled systems." Chemical Physics Letters 357, no. 3-4 (May 2002): 241–48. http://dx.doi.org/10.1016/s0009-2614(02)00493-1.

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10

Despoja, V., L. Marušić, and M. Šunjić. "Excitation spectra of coupled metallic slabs." Solid State Communications 140, no. 6 (November 2006): 270–75. http://dx.doi.org/10.1016/j.ssc.2006.08.036.

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Дисертації з теми "Coupled excitation"

1

Young, Anita. "Fluorescence studies in the inductively coupled plasma." Thesis, University of Plymouth, 2002. http://hdl.handle.net/10026.1/1686.

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An Optima 3000 ICP-AES instrument was modified and the equipment necessary to carry out axial excitation atomic fluorescence was designed and constructed. Using this calibrated system, preliminary fluorescence experiments were not successful. As fluorescence is proportional to source intensity, it was considered that the excitation source, a hollow cathode lamp, may not have been sufficiently intense to produce fluorescence. A novel excitation source-driver system was designed and built in-house to operate HCLs, BDHCLs and LEDs with variable modulation frequencies and duty cycle capabilities. Studies investigating lamp response to changes in modulation frequency and duty cycle indicated that a lamp operated with a lower modulation frequency range (167 - 542 Hz) and higher duty cycles (30 - 50 %) should provide the preferred intense excitation conditions for the production of fluorescence in the ICP, When a Thermo Elemental PQ2 instrument was used, fluorescence was obtained immediately. Um'variate searches were used to optimise several plasma parameters, i.e. forward power; viewing height ALC; plasma, nebuliser and auxiliary gas flow rates. Once the optimum conditions had been determined, calibration curves were plotted for each of the elements studied (Ba, Li, Mg and Na). The calibration showed excellent linearity over five orders of magnitude (R? values ranged from 0.99995 to 1.0000) and the precision on each data point was better than 5 % RSD. Limits of detection were determined to be 27.6, 0.51, 0.43 and 0.20 ug 1* for Ba, L i , Mg and Na, respectively, which approached those reported in the literature for a commercial system. Vertical profiles of the plasma, using radial excitation, were obtained for Ba, Li , Mg and Na. Using the optimum conditions for Li and Na, vertical profiles of the plasma, using axial excitation with the more intense LEDs, were obtained. Both profiles showed that there was a relatively sharp optimum, with respect to fluorescence signal, as a function of viewing height ALC. The optimum viewing heights ALC obtained, for both radial and axial excitation fluorescence, were identical, suggesting that, irrespective of the excitation arrangement employed, only particular conditions produced in the plasma give the optimum conditions for fluorescence and that these are spatially dependent. Plasma diagnostics were performed in an attempt to explain why fluorescence was observed using the plasma produced by the Thermo Elemental but not by the Optima 3000 generator. At a viewing height of 50 mm ALC, Texc and Trot were 3080 and 2500 K for plasmas produced using the Thermo Elemental generator and 3600 and 2830 K for the Optima 3000 generator, respectively. Temperatures were calculated using the mean emission intensity at particular wavelengths. The intensities of the emitting species from the Thermo Elemental ICP were lower than those obtained from the Optima 3000 ICP for supposedly 'identical' conditions. If the number of excited species gives rise to lower emission intensities, then there must be more atoms in the lower/ground state from the plasma produced using the Thermo Elemental generator. This is of vital importance because for fluorescence to occur the fluorescence emission intensity will be dependent on the number available in the ground state for excitation {i.e. a relatively 'cool' plasma is required for fluorescence to occur). As very similar plasma operating conditions and the same concentration solutions were used in the fluorescence experiments performed using both the Optima 3000 and the Thermo Elemental ICPs, the differences observed in plasma performance may be attributed to efficiency of coupling of the generators used.
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2

Caughlin, Brenda Lea. "Analyte excitation and ionization in the argon inductively coupled plasma." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/27038.

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A new approach to evaluating departures from local thermal equilibrium (LTE) in the inductively coupled plasma (ICP) is described. Experimentally evaluated electron density (n[sub e]) is used as the basis for an LTE framework. Spatially resolved, radial electron density profiles were measured under a variety of plasma operating conditions. The variation of n[sub e] with spatial position, aerosol flow rate, input power and presence of easily ionizable elements was determined. The measured n[sub e] was used to calculate an LTE temperature, T[sub e,LTE]. This temperature was higher than most spectroscopically measured temperatures in the plasma. LTE ion-atom emission intensity ratios for Sr, Ca, Mg, Cd and Zn were calculated from n[sub e] and T[sub e,LTE] compared to experimental values. Ion-atom ratios were within an order of magnitude of LTE values and, in most cases, less than the LTE values. The infrathermal ion-atom ratios were interpreted as being due to an overpopulation of the atom levels relative to LTE populations. Experimental degree of ionization was evaluated for a number of elements and compared to LTE values. Elements were underionized relative to LTE values. Degree of ionization and departure from LTE were correlated with ionization potential of the element. Elements with a high ionization potential had lower degrees of ionization and exhibited greater departures from LTE than elements of lower ionization potential. The underionization and infrathermal ion-atom intensity ratios are attributed to overpopulation of atom levels. The experimental observations and results of other plasma diagnostic studies are discussed in terms of a partial LTE (p-LTE) model for the ICP. The ion ground state and upper energy levels of atoms are in Saha equilibrium. Lower atomic levels are over populated with respect to these levels. The overpopulation of the lower levels is a consequence of radiative depopulating processes, such as radiative decay and radiative recombination, not being balanced by their inverse absorption processes. For low lying atomic levels where radiative processes make significant contribution to the total depopulation rates this improper balance causes deviations from LTE populations. The atom ground state is the most overpopulated level and overpopulation decreases with increasing energy of the level until p-LTE is reached for the upper atomic levels.
Science, Faculty of
Chemistry, Department of
Graduate
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3

Kubota, Madoka. "Energy Harvesting Characteristics of Nonlinear Oscillators under Excitation." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/199315.

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4

Lebrun, Romain. "Coupled vortex dynamics in spin-torque oscillators : from resonant excitation to mutual synchronization." Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLS233/document.

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La découverte de la magnétorésistance géante en 1988 est considérée comme la date de naissance d’un nouveau et dynamique champ de recherche appelé l’électronique de spin. La riche physique associée au transport de spin devrait révolutionner le futur de la nanoélectronique. Dans ce cadre les nano-oscillateurs à transfert de spin (STOs) se sont positionnés comme des candidats sérieux pour le développement d’une nouvelle génération de dispositifs rf basés sur l’électronique de spin.Au début de ma thèse, l’important bruit de phase des STOs restait une contrainte majeure limitant les perspectives technologiques à ce type d’oscillateurs. Dans cette thèse nous avons cherché à contrôler la dynamique des STOs et à réduire leur bruit phase en développant différentes stratégies : (i) l’optimisation des propriétés des matériaux magnétiques utilisés (ii) l’excitation de modes couplés dans des systèmes hybridés (iii) la stabilisation de la dynamique de la phase d’un STO avec un signal extérieur de référence (iv) la synchronisation mutuelle de différents oscillateurs pour améliorer la cohérence spectrale et la puissance des STOs. Nous focalisons en particulier sur le cas de STO à base de vortex magnétique qui présentent intrinsèquement des cohérences spectrales plus élevées que celles d’autres types d’oscillateurs.Dans une première partie, nous nous proposons d’identifier et d’étudier les différents mécanismes qui régissent et contrôle la dynamique d’un STO à base de vortex magnétique dans les régimes auto-oscillant et non-autonomes. Nous mettons tout d’abord en évidence que l’excitation de modes couplés permet de contrôler les propriétés rf d’un oscillateur unique en prenant l’exemple d’un STO à base de deux vortex magnétiques couplés. Par la suite, nous étudions la synchronisation « parfaite » de ces STOs à base de vortex avec un courant rf de référence. Nous corrélons l’observation d’une largeur de raie d’un hertz et d’un bruit de phase minimum de -90 dBc/Hz à 1kHz de la porteuse dans l’état synchronisé à une absence de glissement de phase, i.e. à l’absence de phénomène de désynchronisation. Le fort couple de Field-like planaire mesuré dans ces STOs représente un outil précieux pour contrôler le processus de synchronisation. Dans le cas des STOs à double vortex, un tel contrôle nous permet d’observer des phénomènes physiques exotiques allant de la synchronisation simultanée de plusieurs modes, à de l’auto-synchronisation en passant par des dynamiques de synchronisation incohérentes.Dans une seconde partie, nous proposons différents concepts innovants de dispositifs rf à base de vortex magnétique. Nous présentons tout d’abord les bases d’une boucle à retard de phase permettant d’asservir un STO. En prenant avantage du fort couple de Field Like, nous développons un nouveau schéma de détection rf, plus efficace que les actuelles diodes Schottky, basé sur un renversement d’aimantation en expulsant réversiblement le cœur de vortex à l’aide d’un courant rf. Finalement, nous démontrons qu’il est possible de synchroniser électriquement deux STOs connectés directement en parallèle ou en série, ou à l’aide d’une ligne à retard. Nous montrons ainsi qu’une forte amélioration de la cohérence spectrale (d’un facteur 2) et de la puissance (d’un facteur 4 pour un maximum de 1.6 μW) peut être obtenues dans l’état synchronisé. A l’aide de la ligne à retard, nous mettons par ailleurs en évidence le rôle crucial du déphasage entre les deux STOs sur les propriétés de l’état synchronisé. Ces résultats prometteurs ouvrent la voie vers la synchronisation de réseaux de STOs sans champ appliqué et sans ligne à retard entre les oscillateurs.Dix ans après leur découverte, les oscillateurs à transfert de spin n’ont toujours pas dévoilé tout leur potentiel et de nouvelles applications sont maintenant envisagées, allant de dispositif rf classiques à des circuits logiques et dispositifs bio-inspirés basés sur les STOs
The discovery of the giant magnetoresistance in 1988 is considered as the birth date of a new and dynamic research field called spintronics. The rich physics associated with spin transport has created a breakthrough for the future of nano-electronics. In the magnetism roadmap, spin-torque oscillators (STOs) are candidates for future generation of spintronic based rf-devices.At the beginning of this thesis, one major issue of spin-torque oscillators remained their poor spectral coherence. To overcome this issue, we have investigated different approaches: (i) the development of magnetic materials with a low damping and large spin-polarization, (ii) the study of collective mode dynamics in hybridized magnetic systems (iii) the stabilization of the STO dynamics with a reference external signal (iv) the synchronization of multiple STOs to enhance both their power and spectral coherence. We focus our work on vortex based STOs which present higher spectral coherences than other kinds of STOs.In a first part, we study the different mechanisms that can drive and stabilize the dynamics of a vortex based STO in the autonomous and non-autonomous regimes. We first highlight that the excitation of collective modes allows the harnessing the rf-properties of a single and isolated in a double vortex based STO. Then we report the ``perfect'' phase-locking of a STO with an external rf-current. To go beyond this analysis, we notice that a 1 Hz minimum linewidth and a flat phase noise level of -90 dBc/Hz at 1 kHz from the offset frequency in the locked state could be associated with the absence of phase slips, i.e desynchronization events. We demonstrate that the locking process is driven by a Field-like in-plane torque which gives the possibility to control with precision the STO locking process. In our double vortex based STO, we can even observe exotic behaviors such as multi-mode synchronization, self-resonance and eventually incoherent motion. Such a degree of control, unexpected for a nano-scale oscillator, is particularly promising for the development of STO based nanodevices.In a second part, we propose different concepts of spintronic rf-devices based on vortex STOs. We describe the basis of an on-chip STO based phase locked loop. By taking advantage of the large Field-like torque in our STOs, we develop a new radio-frequency detection scheme, more efficient than the state of the art Schottky diode, based on magnetization switching through the resonant and reversible expulsion of the vortex core. Finally, we show the first experimental observation of the electrical synchronization of two STOs connected directly in parallel or in series, or with an electrical delay line. In the synchronized state, we show a strong improvement of both the spectral coherence (by a factor 2) and the output power (by a factor 4, up to 1.6 μW). We also demonstrate, with an electrical delay line, the strong impact of the phase shift between the two STOs on the synchronized regime. These promising results open the way for the synchronization of STO arrays at zero field and without electrical delays.Ten years after their discovery, spin-torque oscillators have thus not yet revealed all their potential and promising applications could be soon targeted, in order to realize a spin logic circuit, bio-inspired spintronic devices and more classical rf-applications
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5

Tzanidis, Ioannis. "Ultrawideband Low-Profile Arrays of Tightly Coupled Antenna Elements: Excitation, Termination and Feeding Methods." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1316439948.

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6

Garrido, Mauricio. "Quantum Optics in Coupled Quantum Dots." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1273589966.

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7

Patil, Anjali Narendra. "Delamination Detection in Concrete Using Disposable Impactors for Excitation." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3885.

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Delaminations in concrete bridge decks result primarily from corrosion of the reinforcing bars (or rebar). This corrosion leads to volumetric expansion of the rebar. When the rebar expands, concrete cracks, and there is a localized separation of the concrete cover from the underlying concrete. Impact-echo testing is an effective technique to map delaminations on concrete bridge decks. However, mapping speed is limited by necessary retrieval of the impactor for traditional tests. To achieve higher scanning speeds, it is advantageous to use both a non-contact measurement (air-coupled impact-echo) and disposable-impactor excitation. Disposable impactors have the potential advantage of achieving greater deck scanning speeds because they do not need to be retrieved, and they can also be used with air-coupled measurement systems. This thesis reports impact excitation of concrete using disposable impactors such as water droplets and ice balls. The impact characteristics of these impactors are compared with those of steel balls and chain links. Comparing the acoustic recordings on intact and delaminated concrete surface shows that water droplets and ice balls are able to excite flexural resonant modes associated with delamination defects. The use of water droplets and ice balls for shallow delamination detection in concrete is thus demonstrated.
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8

陳志遠 and Chee-yuen George Chan. "Investigation of matrix effects on excitation conditions of dry inductively coupled plasma using laser ablation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B42128687.

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Chan, Chee-yuen George. "Investigation of matrix effects on excitation conditions of dry inductively coupled plasma using laser ablation." Click to view the E-thesis via HKUTO, 2000. http://sunzi.lib.hku.hk/hkuto/record/B42128687.

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10

Smith, Thomas Riddell. "Excitation processes within an inductively coupled plasma as a function of pressure and related studies." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184582.

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Spectroscopic investigations have been carried out on an argon inductively coupled plasma operating at non-atmospheric pressure. The relationship between torch pressure and a number of plasma operating characteristics was explored for torch pressures between 100 and 3000 torr. The plasma operating characteristics examined include observed analyte emission intensities, electron densities, ion to atom ratios, and the deviation of plasma conditions from local thermodynamic equilibrium. The effect of pressure on the observed analyte emission intensities was found to include factors in addition to the change in density of species within the torch. Emission lines originating from ions and atoms with high ionization potentials (greater than 7 eV) increased in intensity with increasing torch pressure, in excess of that predicted by the increase in density of species present. Conversely, emission lines originating from atoms of low ionization potential decreased in intensity with increasing torch pressure despite the increase in density. The results of the spatial determination of electron densities and ion to atom ratios indicate that excitation conditions within the central channel of the plasma are shifted towards conditions of local thermodynamic equilibrium as the pressure within the torch is increased. In addition, it is possible to obtain improved limits of detection by optimizing the torch pressure for the analyte element of interest.
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Книги з теми "Coupled excitation"

1

Center, Langley Research, ed. Mobility power flow analysis of coupled plate structure subjected to mechanical and acoustic excitation. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1992.

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2

Lee, Timothy J. Comparison of the quadratic configuration interaction and coupled cluster approaches to electron correlation including the effect of triple excitations. [Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1991.

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3

Lee, Timothy J. Comparison of the quadratic configuration interaction and coupled cluster approaches to electron correlation including the effect of triple excitations. [Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1991.

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4

Perel, Esther. L'intelligence érotique: Faire vivre le désir dans le couple. Paris: Robert Laffont, 2007.

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5

Discovering your couple sexual style: The key to sexual satisfaction. New York: Routledge, 2009.

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6

Plaisirs et défis du lien amoureux. Montréal: Vlb, 2000.

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7

Bernholdt, David Edward. Triple excitation effects in the fock-space coupled cluster method. 1993.

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8

Mobility power flow analysis of coupled plate structure subjected to mechanical and acoustic excitation. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1992.

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9

National Aeronautics and Space Administration (NASA) Staff. Mobility Power Flow Analysis of Coupled Plate Structure Subjected to Mechanical and Acoustic Excitation. Independently Published, 2018.

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10

Magers, David Huey. The N3H3 molecular system and a coupled-cluster effective Hamiltonian for electronic spectra. 1988.

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Частини книг з теми "Coupled excitation"

1

Zhai, Wanming. "Excitation Models of Vehicle–Track Coupled System." In Vehicle–Track Coupled Dynamics, 151–202. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9283-3_3.

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2

Zhang, Taishi, Tingting Zhao, Peiyan Yuan, and Qing-Hua Xu. "Plasmon-Enhanced Two-Photon Excitation Fluorescence and Biomedical Applications." In Surface Plasmon Enhanced, Coupled and Controlled Fluorescence, 211–25. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119325161.ch13.

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Marinone, Timothy, David Cloutier, Bruce LeBlanc, Thomas Carne, and Palle Andersen. "Artificial and Natural Excitation Testing of SWiFT Vestas V27 Wind Turbines." In Dynamics of Coupled Structures, Volume 1, 343–53. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04501-6_33.

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Flores, F., and E. C. Goldberg. "Electron Tunneling Excitation of a Coupled Two Impurity System." In Many-body Approaches at Different Scales, 107–23. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72374-7_9.

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5

Cveticanin, Livija, Miodrag Zukovic, and Jose Manoel Balthazar. "Two Degree-of-Freedom Oscillator Coupled to a Non-ideal Source." In Dynamics of Mechanical Systems with Non-Ideal Excitation, 121–40. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-54169-3_4.

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Malagarriga, Daniel, Alessandro E. P. Villa, Jordi García-Ojalvo, and Antonio J. Pons. "Excitation/Inhibition Patterns in a System of Coupled Cortical Columns." In Artificial Neural Networks and Machine Learning – ICANN 2014, 651–58. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11179-7_82.

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Du, Jing, Yang Xu, and Zhihui Wei. "Coupled Squeeze-and-Excitation Blocks Based CNN for Image Compression." In Intelligence Science and Big Data Engineering. Visual Data Engineering, 201–12. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-36189-1_17.

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Yoon, Y. J., and R. A. Ibrahim. "Response Statistics of a Nonlinear Coupled Oscillator Under Parametric Excitation." In Computational Stochastic Mechanics, 789–800. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3692-1_66.

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Soldatenko, Yu N., and F. T. Vasko. "Hot Electrons in the Tunnel-Coupled Quantum Wells under Intersubband Excitation." In Hot Carriers in Semiconductors, 523–25. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0401-2_119.

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Ibrahim, R. A., Y. J. Yoon, and M. Evans. "Experimental and Analytical Investigation of Nonlinear Coupled Oscillators under Random Excitation." In Nonlinear Dynamics in Engineering Systems, 117–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-83578-0_15.

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Тези доповідей конференцій з теми "Coupled excitation"

1

Ozguler, A., Vladimir Manucharyan, and Maxim Vavilov. "Excitation dynamics in galvanically coupled fluxonium circuits." In Excitation dynamics in galvanically coupled fluxonium circuits. US DOE, 2021. http://dx.doi.org/10.2172/1779479.

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2

LePera, Steve, Uri Vandsburger, Steve LePera, and Uri Vandsburger. "Coupled multiple jet excitation." In 35th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-75.

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3

Zabolotsky, A. M., T. R. Gazizov, A. G. Bova, and W. A. Radasky. "Dangerous pulse excitation of coupled lines." In 17th International Zurich Symposium on Electromagnetic Compatibility. IEEE, 2006. http://dx.doi.org/10.1109/emczur.2006.214895.

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4

Kolari, K., A. Hokkanen, M. Kuittinen, J. Simonen, and P. Heimala. "Optimising a grating-coupled evanescent field excitation." In Photonics Europe, edited by Brian Culshaw, Anna G. Mignani, Hartmut Bartelt, and Leszek R. Jaroszewicz. SPIE, 2006. http://dx.doi.org/10.1117/12.662622.

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5

Osada, Reiko, and Chikara Sato. "Stabilization of Inverted Coupled Pendula Using Parametric Excitation." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/vib-4008.

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Анотація:
Abstract Parametric stabilization of a single inverted pendulum has been extensively studied using the Mathieu equation and its corresponding stability diagram. The inverted single pendulum may be stabilized using parametric excitation at a specified frequency and amplitude given by a narrow stable region in the Mathieu diagram. Coupled pendula with parametric excitation or corresponding resonant systems have been studied from mathematical view point (Cesari, 1959; Gambill, 1955; Richards, 1983), from electrical view point (Sato, 1962a; Sato, 1962b; Sato, 1971; Sato, 1975) and from mechanical view point (Sato, 1995). Coupled pendula with parametric excitation have been studied within a limited region by some researchers, including the authors. A study of inverted coupled pendula with parametric excitation has not been performed as far as the authors know. Usually it is assumed that inverted coupled pendula are unstable in the absence of any other stabilizing mechanism such as feedback. One question is whether the inverted coupled pendula could be stabilized only by parametric excitation? The present paper gives an affirmative answer to this question in a limited and finite region. The stability is also examined using the differential equations and other methods.
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Zhang, Dayi, Robert Watson, Jianlin Cao, Taiyi Zhao, Gordon Dobie, Charles MacLeod, and Gareth Pierce. "Dry-Coupled Airborne Ultrasonic Inspection Using Coded Excitation." In 2020 IEEE International Ultrasonics Symposium (IUS). IEEE, 2020. http://dx.doi.org/10.1109/ius46767.2020.9251483.

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Ozawa, Takashi, Toshiyuki Suzuki, H. Osawa, Hiroki Takayanagi, and Kazuhisa Fujita. "Electronic Excitation Modeling for Inductively Coupled Plasma Flows." In 49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2011. http://dx.doi.org/10.2514/6.2011-142.

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8

Sampath, Arun M., C. Nataraj, and H. Ashrafiuon. "Optimal Design of Coupled Structures Subjected to Random Excitation." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0043.

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Анотація:
Abstract This paper presents optimization of the response of coupled structures subjected to random excitation. The dynamic system involves discrete and continuous models of coupled structures. The structures are assumed to be subjected to white noise excitation of known power spectral density. The mean square response of the structure is taken as the objective function. The physical properties such as length, thickness, stiffness and damping are taken as the design variables. The discrete system is assumed to be subjected to two kinds of excitation; band-limited white noise excitation and ideal white noise excitation. Coupling stiffness and damping characteristics are used as design variables. For the case of continuous coupled beam model, band-limited white noise excitation is considered and the root mean square response of the structure is minimized for a range of excitation frequency. Geometric properties of the structure are used as design variables.
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Luchinsky, Dmitry G., Peter V. E. McClintock, Andrey Polovinkin, and Grigori Osipov. "Stochastic excitation and synchronization in coupled FitzHugh-Nagumo elements." In SPIE's First International Symposium on Fluctuations and Noise, edited by Lutz Schimansky-Geier, Derek Abbott, Alexander Neiman, and Christian Van den Broeck. SPIE, 2003. http://dx.doi.org/10.1117/12.489027.

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10

Neuner III, Burton, Dmitriy Korobkin, Chris Fietz, Davy Carole, Gabriel Ferro, and Gennady Shvets. "Critically coupled surface phonon-polariton excitation in silicon carbide." In SPIE NanoScience + Engineering, edited by Mark I. Stockman. SPIE, 2009. http://dx.doi.org/10.1117/12.825403.

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Звіти організацій з теми "Coupled excitation"

1

Castellano, Mike J., Abraham G. Shaviv, Raphael Linker, and Matt Liebman. Improving nitrogen availability indicators by emphasizing correlations between gross nitrogen mineralization and the quality and quantity of labile soil organic matter fractions. United States Department of Agriculture, January 2012. http://dx.doi.org/10.32747/2012.7597926.bard.

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Анотація:
A major goal in Israeli and U.S. agroecosystems is to maximize nitrogen availability to crops while minimizing nitrogen losses to air and water resources. This goal has presented a significant challenge to global agronomists and scientists because crops require large inputs of nitrogen (N) fertilizer to maximize yield, but N fertilizers are easily lost to surrounding ecosystems where they contribute to water pollution and greenhouse gas concentrations. Determination of the optimum N fertilizer input is complex because the amount of N produced from soil organic matter varies with time, space and management. Indicators of soil N availability may help to guide requirements for N fertilizer inputs and are increasingly viewed as indicators of soil health To address these challenges and improve N availability indicators, project 4550 “Improving nitrogen availability indicators by emphasizing correlations between gross nitrogen mineralization and the quality and quantity of labile organic matter fractions” addressed the following objectives: Link the quantity and quality of labile soil organic matter fractions to indicators of soil fertility and environmental quality including: i) laboratory potential net N mineralization ii) in situ gross N mineralization iii) in situ N accumulation on ion exchange resins iv) crop uptake of N from mineralized soil organic matter sources (non-fertilizer N), and v) soil nitrate pool size. Evaluate and compare the potential for hot water extractable organic matter (HWEOM) and particulate organic matter quantity and quality to characterize soil N dynamics in biophysically variable Israeli and U.S. agroecosystems that are managed with different N fertility sources. Ultimately, we sought to determine if nitrogen availability indicators are the same for i) gross vs. potential net N mineralization processes, ii) diverse agroecosystems (Israel vs. US) and, iii) management strategies (organic vs. inorganic N fertility sources). Nitrogen availability indicators significantly differed for gross vs. potential N mineralization processes. These results highlight that different mechanisms control each process. Although most research on N availability indicators focuses on potential net N mineralization, new research highlights that gross N mineralization may better reflect plant N availability. Results from this project identify the use of ion exchange resin (IERs) beads as a potential technical advance to improve N mineralization assays and predictors of N availability. The IERs mimic the rhizosphere by protecting mineralized N from loss and immobilization. As a result, the IERs may save time and money by providing a measurement of N mineralization that is more similar to the costly and time consuming measurement of gross N mineralization. In further search of more accurate and cost-effective predictors of N dynamics, Excitation- Emission Matrix (EEM) spectroscopy analysis of HWEOM solution has the potential to provide reliable indicators for changes in HWEOM over time. These results demonstrated that conventional methods of labile soil organic matter quantity (HWEOM) coupled with new analyses (EEM) may be used to obtain more detailed information about N dynamics. Across Israeli and US soils with organic and inorganic based N fertility sources, multiple linear regression models were developed to predict gross and potential N mineralization. The use of N availability indicators is increasing as they are incorporated into soil health assessments and agroecosystem models that guide N inputs. Results from this project suggest that some soil variables can universally predict these important ecosystem process across diverse soils, climate and agronomic management. BARD Report - Project4550 Page 2 of 249
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